26396621 has 4 divisors (see below), whose sum is σ = 26530812. Its totient is φ = 26262432.

The previous prime is 26396603. The next prime is 26396633. The reversal of 26396621 is 12669362.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20340100 + 6056521 = 4510^2 + 2461^2 .

It is a cyclic number.

It is not a de Polignac number, because 26396621 - 2¹⁸ = 26134477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26396021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66800 + ... + 67193.

It is an arithmetic number, because the mean of its divisors is an integer number (6632703).

Almost surely, 2^26396621 is an apocalyptic number.

It is an amenable number.

26396621 is a deficient number, since it is larger than the sum of its proper divisors (134191).

26396621 is a wasteful number, since it uses less digits than its factorization.

26396621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134190.

The product of its digits is 23328, while the sum is 35.

The square root of 26396621 is about 5137.7642024523. The cubic root of 26396621 is about 297.7484063266.

The spelling of 26396621 in words is "twenty-six million, three hundred ninety-six thousand, six hundred twenty-one".